S-299 Digital Power Amplifier — 4.1 Channel (40W×4) with Bluetooth 5.0, USB/SD/AUX — Home & Car Audio

Compact S-299 4.1-channel digital amplifier designed for flexible home or mobile audio setups. Its outputs can be split into two independent 2.0-channel groups with separate volume control, plus a dedicated low-frequency output for an active subwoofer — allowing easy configuration as 2.0, 2.1, 4.0 or 4.1 systems. Power & compatibility: Rated at 40W × 4, the amplifier drives speakers with 4–8 ohm impedance, making it suitable for most home, car and boat speaker loads. Multiple source options: Supports Bluetooth 5.0 wireless streaming and wired inputs including stereo RCA and 3.5mm AUX. There are also USB (U-disk) and SD/MM card slots for direct playback of lossless music files from removable media. Compatible with cellphones, MP3 players, CD players, dataplayers, computers and decoders. Controls & display: Physical volume knob plus treble and bass adjustment let you shape the sound. A front LED display reports real-time operating status, and a supplied remote control simplifies operation from a distance. Power supply & use cases: Operates from DC 12V–14V, so it works in desktop home systems as well as in cars, boats, RVs and golf carts — anywhere a compact, low-distortion amplifier is needed. Parameters: Audio input: / USB(U-disk) / stereo RCA / 3.5mm AUX / SD & Card